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Bugzilla Account Creation / XSS / Information Leak

Bugzilla Account Creation / XSS / Information Leak
Posted Oct 7, 2014
Authored by Frederic Buclin, Byron Jones, David Lawrence, Netanel Rubin, Simon Green, James Kettle, Matt Tyson | Site bugzilla.org

Bugzilla Security Advisory - Bugzilla versions 2.23.3 to 4.0.14, 4.1.1 to 4.2.10, 4.3.1 to 4.4.5, and 4.5.1 to 4.5.5 suffer from unauthorized account creation, cross site scripting, and information leak vulnerabilities.

tags | advisory, vulnerability, xss, info disclosure
advisories | CVE-2014-1571, CVE-2014-1572, CVE-2014-1573
SHA-256 | 0d0e7c27532f6562403faf6ddb1249c6fce16ba6525feadfe7c92217191a6748

Bugzilla Account Creation / XSS / Information Leak

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Summary
=======

Bugzilla is a Web-based bug-tracking system used by a large number of
software projects. The following security issues have been discovered
in Bugzilla:

* The 'realname' parameter is not correctly filtered on user account
creation, which could lead to user data override.
* Several places were found in the Bugzilla code where cross-site
scripting attacks could be used to access sensitive information.
* Private comments can be shown to flagmail recipients who aren't in
the insider group
* Specially formatted values in a CSV search results export could be
used in spreadsheet software to attack a user's computer.

All affected installations are encouraged to upgrade as soon as
possible.


Vulnerability Details
=====================

Class: Unauthorized Account Creation
Versions: 2.23.3 to 4.0.14, 4.1.1 to 4.2.10, 4.3.1 to 4.4.5, 4.5.1 to 4.5.5
Fixed In: 4.0.15, 4.2.11, 4.4.6, 4.5.6
Description: An attacker creating a new Bugzilla account can override certain
parameters when finalizing the account creation that can lead to the
user being created with a different email address than originally
requested. The overridden login name could be automatically added
to groups based on the group's regular expression setting.
References: https://bugzilla.mozilla.org/show_bug.cgi?id=1074812
CVE Number: CVE-2014-1572

Class: Cross-Site Scripting
Versions: 2.17.1 to 4.0.14, 4.1.1 to 4.2.10, 4.3.1 to 4.4.5, 4.5.1 to 4.5.5
Fixed In: 4.0.15, 4.2.11, 4.4.6, 4.5.6
Description: During an audit of the Bugzilla code base, several places
were found where cross-site scripting exploits could occur which
could allow an attacker to access sensitive information.
References: https://bugzilla.mozilla.org/show_bug.cgi?id=1075578
CVE Number: CVE-2014-1573

Class: Information Leak
Versions: 2.17.1 to 4.0.14, 4.1.1 to 4.2.10, 4.3.1 to 4.4.5, 4.5.1 to 4.5.5
Fixed In: 4.0.15, 4.2.11, 4.4.6, 4.5.6
Description: If a new comment was marked private to the insider group, and a flag
was set in the same transaction, the comment would be visible to
flag recipients even if they were not in the insider group.
References: https://bugzilla.mozilla.org/show_bug.cgi?id=1064140
CVE Number: CVE-2014-1571

Class: Social Engineering
Versions: 2.17.1 to 4.0.14, 4.1.1 to 4.2.10, 4.3.1 to 4.4.5, 4.5.1 to 4.5.5
Fixed In: 4.0.15, 4.2.11, 4.4.6, 4.5.6
Description: Search results can be exported as a CSV file which can then be
imported into external spreadsheet programs. Specially formatted
field values can be interpreted as formulas which can be executed
and used to attack a user's computer.
References: https://bugzilla.mozilla.org/show_bug.cgi?id=1054702


Vulnerability Solutions
=======================

The fixes for these issues are included in the 4.0.15, 4.2.11, 4.4.6, and
4.5.6 releases. Upgrading to a release with the relevant fixes will protect
your installation from possible exploits of these issues.

If you are unable to upgrade but would like to patch just these
individual security vulnerabilities, there are patches available for
the issues at the "References" URL for each vulnerability.

Full release downloads, patches to upgrade Bugzilla from previous
versions, and CVS/bzr upgrade instructions are available at:

http://www.bugzilla.org/download/


Credits
=======

The Bugzilla team wish to thank the following people/organizations for
their assistance in locating, advising us of, and assisting us in fixing
these issues:

Simon Green
Byron Jones
James Kettle
Netanel Rubin of Check Point Vulnerability Research
Frédéric Buclin
Matt Tyson
David Lawrence

General information about the Bugzilla bug-tracking system can be found
at:

http://www.bugzilla.org/

Comments and follow-ups can be directed to the mozilla.support.bugzilla
newsgroup or the support-bugzilla mailing list.
http://www.bugzilla.org/support/ has directions for accessing these
forums.
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